don't repeat field name if same as last, support format_name and
format_delimiter on field level if using iterate_by_page (without this, it's
really hard to get useful formating when using iterate_by_page), don't warn
on rare occasion (which is faulty import_xml definition, but anyway...) when
using append="1"

implemented index_delimiter which enables to to format index entries in format
(values to be inserted in index);;(values to be displayed) if there is
definition of index_delimiter=";;". This will allow you to index (and
search) through values from original database and still have ability to
display lookup fields.

major improvements: you can select order of scanning in each topic tag
to be eather by line (which is default, repeatable fields in one line will
be unrolled) or page-by-page (using new interate_by_page="1" attribute).
New page-by-page mode is really useful with lookups (because you can
append fields with lookups in same line, but using two tags), but it will
create multiple rows in html output.

Added type="swish_exact" to save data into swish index with boundaries
xxbxx data xxexxx. This is helpful to implement exact match from beginning
of query and exact match to full query which are defined using e[nr] field
in web user interface (with same [nr] as f[nr] and v[nr] fields) which
have to have value 1 (from beginning) 2 (from end, not that useful...) or
3 (1+2 - exact match)

added configuration file with database descriptions,
moved isis.xml definition file in separate directory (in preparation for MARK),
support for different encodings in different files,
various fixes, improvements and badly written parts which will change ;-)